android–HttpURLConnection.getInputStream很慢

概述与使用相同服务器端服务的iPhoneApp相比,HttpURLConnection.getInputStream需要很长时间.以下代码用于服务：date=newjava.util.Date();Log.d("time","TimeStampbeforeposting"+newTimestamp(date.getTime()));URLur=newU

与使用相同服务器端服务的iPhone App相比,httpURLConnection.getinputStream需要很长时间.

以下代码用于服务：

         date= new java.util.Date();                      Log.d("time","Time Stamp before posting  "+new Timestamp(date.getTime()));         URL ur= new URL(url);                    httpURLConnection conn = (httpURLConnection) ur.openConnection();         conn.setRequestProperty("Connection", "close");         conn.setReadTimeout(10000);         conn.setConnectTimeout(15000);         conn.setRequestMethod("POST");         conn.setDoinput(true);         conn.setDoOutput(true);                      OutputStream os = conn.getoutputStream();         BuffereDWriter writer = new BuffereDWriter(                 new OutputStreamWriter(os, "UTF-8"));         writer.write(getquery(nameValuePairs));         writer.close();         os.close();         conn.connect();         StringBuffer response=null;                      try{                        Log.d("time","Time Stamp bfr inputStream  "+new Timestamp(date.getTime()));                 inputStream is = conn.getinputStream();             date= new java.util.Date();                          Log.d("time","Time Stamp aftr inputStream  "+new Timestamp(date.getTime()));                         BufferedReader rd = new BufferedReader(new inputStreamReader(is));             String line;             response = new StringBuffer();              while((line = rd.readline()) != null) {                 response.append(line);                 response.append('\r');             }             rd.close();             response.toString();             result=response.toString();         } catch (Exception e) {        }

要检查服务花费时间的位置,我将日志条目打印到TimeStamp.

该过程的平均时间如下：

Average time for posting to server takes less than 2 Mil seconds
Average time for creating input stream takes almost 5 seconds

Average time for writing response is less than 2 mil seconds.

有什么想法为什么输入流需要很长时间才能使整个服务变得非常慢？

解决方法:

你没有衡量你认为自己在测量什么.在调用getinputStream()或getResponseCode()之前,不会将任何内容写入服务器.所以你真的在测量：

>连接时间
>传输时间
>在服务器上处理时间

当你认为你只是在测量getinputStream()时.

原因是httpURLConnection通过缓冲所有输出来自动设置内容长度标头.您可以通过使用分块传输模式来避免这种情况.那么至少你会看到时间的真正去向.

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